Rubber-containing graft polymer, resin composition containing rubber-containing graft polymer, and shaped article of same

Patent metadata

Field	Value
Publication number	US-11634574-B2
Application number	US-202016897075-A
Country	US
Kind code	B2
Filing date	Jun 9, 2020
Priority date	Dec 25, 2017
Publication date	Apr 25, 2023
Grant date	Apr 25, 2023

Abstract

Provided is a rubber-containing graft polymer which is excellent in mechanical strength such as weld strength or impact strength, required as a rubber-containing graft polymer. A rubber-containing graft polymer (A) of the present invention is a rubber-containing graft polymer having a graft chain, in which when the rubber-containing graft polymer is mixed with an organic solvent and separated into an organic solvent insoluble component and an organic solvent soluble component, a caprolactone unit is contained in a graft chain contained in the organic solvent insoluble component.

First claim

The invention claimed is:

1. A rubber-containing graft polymer which is obtained by emulsion graft polymerization of 5% to 50% by mass of a monomer for grafting (b) comprising a vinyl monomer (f-1) represented by Formula (1) to 50% to 95% by mass of rubber latex,
CH 2 ═CR 1 COO(CH 2 ) q O[CO(CH 2 ) m O] n H  (1)

wherein in the formula, R 1 represents hydrogen or a methyl group, q represents an integer of 2 to 5, m represents an integer of 3 to 10, and n represents an integer of 1 to 10, and
wherein a particle size distribution Dv/Dn of the rubber latex is 1.5 or less, wherein Dv is a volume average particle size, and Dn is a number average particle size.

2. The rubber-containing graft polymer according to claim 1 , wherein the vinyl monomer (f-1) is a vinyl monomer (f-2) represented by Formula (2),
CH 2 ═CR 2 COO(CH 2 ) q O[CO(CH 2 ) 5 O] n H  (2)

in the formula, R 2 represents hydrogen or a methyl group, q represents an integer of 2 to 5, and n represents an integer of 1 to 5.

3. The rubber-containing graft polymer according to claim 1 , wherein the monomer for grafting (b) comprises methyl methacrylate.

4. The rubber-containing graft polymer according to claim 1 , wherein an amount of the vinyl monomer (f-1) is 0.5% to 50% by mass with respect to 100% by mass of the rubber-containing graft polymer.

5. The rubber-containing graft polymer according to claim 1 , wherein a particle size of the rubber to be grafted is 50 to 400 nm.

6. A resin composition containing a rubber-containing graft polymer, the composition comprising:
the rubber-containing graft polymer according to claim 1 ; and
a thermoplastic resin (B).

7. The resin composition containing a rubber-containing graft polymer according to claim 6 , wherein the thermoplastic resin (B) is a polyester resin.

8. The resin composition containing a rubber-containing graft polymer according to claim 6 , wherein the thermoplastic resin (B) is an alloy of an aromatic polycarbonate resin and a polyester resin.

9. The resin composition containing a rubber-containing graft polymer according to claim 6 , wherein the thermoplastic resin (B) is an alloy of an aromatic polycarbonate resin and a styrene-based resin.

10. A shaped article which is obtained by shaping the resin composition containing a rubber-containing graft polymer according to claim 6 .

11. The shaped article according to claim 10 , which is an injection shaped article.

Assignees

• Mitsubishi Chem Corp

Inventors

• HAGI Misaki
• Matsuoka Shinji
• Iimori Masashi
• Hiraoka Tatsuhiro
• MAENAKA Yuuta

Classifications

• C08L67/02

  Polyesters derived from dicarboxylic acids and dihydroxy compounds (C08L67/06 takes precedence) · CPC title

• C08F2/24

  with the aid of emulsifying agents · CPC title

• C08F265/06

  Polymerisation of acrylate or methacrylate esters on to polymers thereof · CPC title

• C08F220/285

  and containing a polyether chain in the alcohol moiety · CPC title

• C08F279/02 Primary

  on to polymers of conjugated dienes · CPC title